Computing modular degrees using L-functions
Journal de théorie des nombres de Bordeaux, Tome 15 (2003) no. 3, pp. 673-682.

Nous donnons un algorithme pour calculer le degré modulaire d’une courbe elliptique définie sur ℚ. Notre méthode est basée sur le calcul de la valeur spéciale en s=2 du carré symétrique de la fonction L attachée à la courbe elliptique. Cette méthode est assez efficace et facile à implémenter.

We give an algorithm to compute the modular degree of an elliptic curve defined over ℚ. Our method is based on the computation of the special value at s=2 of the symmetric square of the L-function attached to the elliptic curve. This method is quite efficient and easy to implement.

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     title = {Computing modular degrees using $L$-functions},
     journal = {Journal de th\'eorie des nombres de Bordeaux},
     pages = {673--682},
     publisher = {Universit\'e Bordeaux I},
     volume = {15},
     number = {3},
     year = {2003},
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     url = {http://www.numdam.org/item/JTNB_2003__15_3_673_0/}
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Delaunay, Christophe. Computing modular degrees using $L$-functions. Journal de théorie des nombres de Bordeaux, Tome 15 (2003) no. 3, pp. 673-682. http://www.numdam.org/item/JTNB_2003__15_3_673_0/

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